镁含量和硅对铁-锌铝镁合金固-液扩散偶中Fe-Al反应层的影响

发布时间：2018-04-19 00:23

本文选题：热浸镀锌 + 固-液扩散偶　；参考：《材料导报》2017年06期

【摘要】：在热浸镀锌中,铁基表面Fe-Al化合物层的形成会影响镀层的生长和质量。将Fe/(Zn-11%Al-3%Mg)和Fe/(Zn-11%Al-x%Mg-0.2%Si)扩散偶在600℃下进行25min的固-液扩散实验,利用扫描电子显微镜(SEM)和能谱仪(EDS)研究了镁含量和硅对铁-锌铝镁合金固-液界面Fe-Al合金层形成的影响。结果表明,Fe/(Zn-11%Al-3%Mg)固-液扩散偶反应层由FeAl3和Fe2Al5相层组成;随着Mg含量的增加,Fe/(Zn-11%Al-x%Mg-0.2%Si)扩散偶中反应层的厚度呈现先增加后减少再增加的变化趋势,当镁含量为3%时反应层厚度最薄;Fe/(Zn-11%Al-3%Mg)扩散偶中Fe-Al反应层的平均厚度比Fe/(Zn-11%Al-3%Mg-0.2%Si)扩散偶中反应层的厚度大60μm,证明Si元素起到抑制Fe-Al反应层形成的作用。研究结果为解释Super Dyma合金镀层中不形成明显的Fe-Al抑制层提供了实验依据。
[Abstract]:In hot-dip galvanizing, forming the surface of iron Fe-Al compound layer will affect the growth and quality of the coating. The Fe/ (Zn-11%Al-3%Mg) and Fe/ (Zn-11%Al-x%Mg-0.2%Si) 25min diffusion couple at 600 DEG C solid-liquid diffusion experiment, scanning electron microscopy (SEM) and energy dispersive spectrometer (EDS) studied the effect of layer formation the content of magnesium and silicon on iron zinc aluminum magnesium alloy solid-liquid interface of Fe-Al alloy. The results show that Fe/ (Zn-11%Al-3%Mg) solid - liquid diffusion reaction layer by the FeAl3 and Fe2Al5 layer; with the increase of Mg content, Fe/ (Zn-11%Al-x%Mg-0.2%Si) even in the thickness of the diffusion reaction layer increased firstly and then decreased trend additional, when the magnesium content is 3% when the thickness of the reaction layer of the thin Fe/; (Zn-11%Al-3%Mg) the average thickness of Fe-Al diffusion reaction layer even in the ratio of Fe/ (Zn-11%Al-3%Mg-0.2%Si) diffusion reaction layer thickness even in 60 m, prove that the element Si to inhibit anti Fe-Al The effect of the formation of the stress layer is found. The results provide an experimental basis for the explanation of the no obvious Fe-Al inhibition layer in the Super Dyma alloy coating.

【作者单位】：常州大学江苏省材料表面科学与技术重点实验室;常州大学江苏省光伏科学与工程协同创新中心;
【基金】：国家自然科学基金(51271041)
【分类号】：TG174.4

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